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Joe 90

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Everything posted by Joe 90

  1. Joe 90
    It should be 3.75 inch unless it's been converted. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  2. Joe 90
    I'd go with Brent's suggestion. If the oil spurts out of the pressure sender hole, then the pump must be pumping it into the main gallery. I would then start it (it should be fine for 15-30sec anyway if the bearings were lubricated on assembly), and if you don't get a reading, I'd change the sender. You can test the gauge by shorting the sender wire to the chassis. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  3. Joe 90
    There always seems to be some oil in a gearbox. Filling the box in-situ can be difficult, so you might want to consider filling it "on the way in", before the filler is in the tunnel. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  4. Joe 90
    Swings and roundabouts. If you put the engine and gearbox in as a unit, it's bigger and the oil tends to run out of the end of the gearbox. If you put the engine in after the gearbox you have to align the shaft with the clutch in-situ, which can be quite frustrating. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  5. Joe 90
    Electrochemical compatibility. Copper and aluminium have different electrochemical potentials, which means that if they are in contact, one will corrode at the expense of the other (this is the principle of galvanisation, where zinc is used to protect steel). Although modern antifreeze contains an inhibitor, I wouldn't risk it. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  6. Joe 90
    Not quite sure exactly how far you mean, but on mine it was the splines that are interference fit. I think it's impossible to tell if the new splines line up with the old grooves or not, but I'm sure it doesn't require anything special. If you press really hard without careful support, the hub will bend. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  7. Joe 90
    Have you checked that all the oil gallery plugs are fitted? The one that caught me out was the one behind the cam shaft sprocket. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  8. Joe 90
    The oil pressure sender feeds off the main oil gallery, which runs all the way from the front of the engine to the back. Somewhere near the front there is a drilling which takes the pressurised oil up the the front rocker post. The front post has a mating drilling which takes the oil to the rocker shaft. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  9. Joe 90
    Analysing the front is a bit more difficult, but the rear is quite easy. Raising the rear raises the centre of gravity relative to the roll centre. This means you get more weight transfer and more oversteer (less understeer) SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  10. Joe 90
    Mark, It's quite realistic to get 3 tonnes force by hitting things with a club hammer. Getting them back in dead straight is a little risky. The 1.5 times diameter is an RAC MSA scrutineering requirement, based on years on experience of wheels coming off race cars. I wouldn't compromise. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  11. Joe 90
    5/16" UNF on mine, but M8 is close enough. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  12. Joe 90
    I've not been impressed with the Gunson CO meter. I bought a second hand Snap-On CO meter for the same money, and that's a lot better. No emissions test for me, so I can't help on that. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  13. Joe 90
    Tony, I changed my studs for longer ones as I was unhappy about the thread s with a 3 mm spacer. I've got the old Triumph centres with a UNF stud, but I think the M12 studs work the same way. It's a press in , press out operation to change the studs. This is easy enough if you have access to a hydraulic press. They took about 3 tonnes of force to shift, which is why even my big vice wouldn't do it. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  14. Joe 90
    The Caterham alloy hubs have been known to crack in extreme race conditions (wheel banging?), but are adequate for most uses. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  15. Joe 90
    I always adjust mine so that the cable is just completely slack with the pedal fully released. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  16. Joe 90
    I've put up a photo in the "Sevens miscellaneous" album. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan
  17. Joe 90
    I've never heard of an oversize rivnut. I would araldite a bit of ally sheet over the old hole. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  18. Joe 90
    NB 4 speed is different. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  19. Joe 90
    My cable has to detour past the battery too. I was concerned at first, but I haven't found it to be a problem really. Apart from the sticky pedal, I find it worthwhile changing the cable every few years as water gets in over time. At this time of year is can freeze and jam the cable. I now immerse the cable in oil overnight before fitting it. I've never had a problem with a new cable though. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  20. Joe 90

    Cornering 'g'

    Joe 90 replied to Tony C's topic in TechTalk

    On a Megagrad on CR500 (road legal) I've seen 1.2g at Mallory. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  21. Joe 90
    *mad*I was going to post up a photo of my carb stabilising bracket, but I've lost the battery from my digital camera *mad* I've borrowed another camera, but that wont talk to my PC *mad* Sometimes things just go against you ☹️ SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  22. Joe 90
    Check that the pedal itself is loose. Mine got gummed up with dried grease and rust. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  23. Joe 90
    There is a pretty simple way to figure out if you should have a charge cooler. If you are running more than 10 psi boost, then the density increase outweighs the pressure loss, so it's worth doing. If you are running less than 7 psi boost, then the density increase doesn't outweight the pressure loss. If you're running between 7 and 10 psi then it's debatable. Turbos can generate boost more easily than mechanically driven superchargers, and more heat gets picked up from the exhaust, so turbos are more commonly fitted with intercoolers. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  24. Joe 90
    Cranks are limited by RPM, not power. As you don't need a lot of RPM to get power out of a turbo engine, I assume you wont be running more than 8500 RPM, in which case a standard crank should be fine. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
  25. Joe 90
    Never used one, but my instinctive reaction is push to go up. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 21 Sept
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